Some Properties of Glass Are Listed Here

Some properties of glass are listed here. A glass window pane is 2.7 m high,2.4 m wide and 9 mm thick.The temperature at the inner surface of the glass is 19ºC and at the outer surface 4°C.How much heat is lost each hour through the window?

A) 3.1 × 10⁷ J
B) 3.1 × 10⁴ J
C) 8.6 × 10³ J
D) 8.6 J
E) 3.1 × 10⁵ J